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A332531
Even numbers k such that A103230(k) is a perfect square.
2
442, 818, 1130, 1226, 1326, 1576, 2454, 3094, 3390, 3678, 3978, 4728, 4862, 5330, 5726, 5986, 6452, 7362, 7786, 7910, 8362, 8398, 8582, 8998, 9282, 10166, 10170, 10250, 11032, 11034, 11934, 12410, 12430, 13486, 13702, 14184, 14586, 15542, 15990, 17178, 17336
OFFSET
1,1
COMMENTS
The odd numbers k such that A103230(k) is a perfect square are the numbers that are divisible only by primes congruent to 3 mod 4 (A004614).
LINKS
EXAMPLE
442 is a term since A103230(442) = 2433600 = 1560^2.
MATHEMATICA
Select[2 * Range[9000], IntegerQ @ Sqrt[Abs[DivisorSigma[1, #, GaussianIntegers -> True]]^2] &]
CROSSREFS
KEYWORD
nonn
AUTHOR
Amiram Eldar, Feb 15 2020
STATUS
approved